Hi, On Wed, Dec 20, 2017 at 05:19:24PM +0530, afzal mohammed wrote: > Cortex-R, as security extension is a requisite for this feature, which > Cortex-R don't have on ARMv7. Okay seems even ARMv8-R doesn't have security extensions, only ARMv8-M has it as compared to ARMv7's. afzal